Boiler



' W. w. WISE BOILER Filed June 21, 1937 3 Sheets-Sheet l W. W. WISE March 22, 1938.

BOILER 3 Sheets-Sheet 2 Filed June 21, 1937 W. W. WISE 7 2,111,655

BOILER Filed June 21, 1937 3 Sheets-Sheet 3 s r v INVENTOR. 1. wQMM Patented Mar. 22, 1938 um so STAT William Washington Wise, chathooee, 're.

Application June 21, 193?, Serial No. MiLMil 21 one. (oi. 122-110) The invention relates to improvements in serve to keep the upper portion of thefire box boilers of the internally fired type having water sheet 2 froin collapsing at the reverse bends IB, legs, and a fire box the top of which is concave under the force of high internal boiler pressure, upward; and. has for its main object an autothereby making this type of boiler adaptable to matic water circulating system which prevents high pressures. 5 the accumulation of mud in the bottom of that Of course, in order to complete the boiler, a portion of the fire boxsheet which is concave smoke box is provided at'th'e front end to convey upward by conveying the mud to the bottom of the flue gases from the lower set of tubes 8 to the the Water legs, thereby preventing deterioration upper set of tubes 9, and at the rear end a suitio of the fire box sheet due to excessive temperatures a t is provided to ct e uppe s o caused by the accumulation of mud, and at the tubes 9 to a smoke stack which disposes of the flue same time, increasing the heating eficiency. gases and at the same time causes a draft. It is to be understood that the type of boiler The boiler as thus described has the defect of illustrated in the description and accompanying accumulating mud in the bottom of the portion 3 drawings is only one of many "in which the inof the fire box sheet which is concave upward. 15

vention may be used, and it is not intended that In order to p vent the c m t 0f mild the invention shall in any wise be limited thereby, onthe fire box'sheet, I provide a horizontal duct but only by the appended claims. it through which the water flows toward the fire A number of forms of the invention are illusd end of t e il r- This duct has openin s trated by the accompanying drawings, in which '20 through'which the mudpasses into the stream Figure 1 is a vertical, longitudinal, central, secof water, and fins 21! which serve to prevent the tional view taken on the line i-l of Figure 4; water fr m l av n th du t th u h p n s 0. Figure 2 is a vertical cross section on the line 2--2 The Wate ay be Propelled by means of One of Figure 1; Figure 3is a vertical cross section on more vertical ducts 22 on each side of the fire the line 3-3 of Figure 1; Figure 4 -is 'a horizontal box, or by means of the tube 23, 0 y b0th. The sectional view along the, line 44 of Figure 1; vertical ducts 22 are connected to the horizontal, Figure 5 .is a detailed view in the perspective or ducts It] by means of d w y i d ducts the horizontal portion of the circulating device; 4. At the summ t of t e ve c c s holes Figure 6 isfa detailed perspective view ofone form 25 y he Provided t allow e Steam 9 e p of the complete circulating device; Figure'] is a, without going-through the downwardly inclined 30 fragmentary section on the line 2-2 of Figure 1 ducts 24.

[showinga slight modification of construction; and I over the fire (1001 n 1 Provide a mud Figures 8 and 9 are fragmentary sections along haflle 25 to prevent h mud whvyed to that end the line 1-! of Figure 4 showing slight modiof the boiler by the horizontal duct l9 from ficati ons of construction. accumulating on the fire door ring I. The-mud The essential features of the boiler shown conl p ss down the si es of the V-sha'pfld u sist of an outer U-shaped wrapper sheet I, an baflle 26 to the bottom of the water legs l3 where inner firebox sheet 2 the top portion 3 of which it can be removed periodically hrou ope i is concave upwardja front end tube sheet 4, a 35 provided for that purpose;

40 front end fire box header plate 5, a rear end outer In 08-89 hO OW bra es (See Figure 'D'l e 5 d 40 tube sheet 6, an inner sheet I bent to form the in lieu of, or in conjunction with braces 1' to 'rear end fire box header plate and innerrear end strengthen the reverse bends it of the fire box tube sheet, a lower set of tubes 8, an upper set of sheet, the vertical ducts 22 .are preferably tubes .9, a fire door ring Land 2. bottom late or n t d to the downwar y" l ed d s 24 y mud ring H. 1 means of upwardly inclined ducts 28 extending 45 The different sheets or plates and fire door ring along the interior of the hollow braces 21, inheretofore mentioned are preferably secured to stead of runnin 11116 duel} Work Over e ev rs each other at their edges by Welds as shown at l2. bends 18 of the fire box sheet. 1 The parts forming the water legs l3 are held in The P mud baflle ducts and 0 their proper places under the force of internal B, and 80111601 8 10 the fins Of duct 19 are boiler pressure by numerous stay bolts l4. Like- Preferably Secured t0 the boiler y tack Weldswise the upper portions of sheets 4 and 6 are held The horizontal duct l9 and fins 2| can be made in place by braces l5, and the upper portions of from a single sheet of metal by curving it to the the outside wrapper sheet I are held inplace by proper shape to form the duct l9,then cutting the through rods l6 and braces l|. Braces I] also 2.! from the bottom edges of duct l9 but leaving them attached to the duct at an upper corner of each fin, and then twisting these connecting corners so as to incline the fins 2| as shown, thus providing the openings 20,

The tube 23 is preferably bent to an S-shape as shown to provide for expansion. It is secured to plate 1 at its ends, either end of which may be secured by means of welds 29 and 30 (see Figure 1), or by means of flange 3| and welds 32 and 30 (see Figure 8), or by means of fiange 33 and rivets 34 (see Figure 9 In Figures 1, 2, and 4, feed water openings 36 and 36' are shown on the end and side of the boiler respectively, either of which openings may be used. When the feed water opening is located near the bottom opening, either of the tube 23, or of one of the vertical ducts 22, I prefer to use a baiile 31 or 38 to prevent the cold feed water from directly entering the tube 23, or the vertical duct 22.

This invention may be used in connection with either high pressure or low pressure boilers; however, I prefer to use it in connection with high pressure steam boilers, because in them more mud is formed due to the precipitation of dissolved minerals at high temperatures which accompany high pressures.

Stay bolts or braces may be placed through holes provided for them in any part or parts of the duct work, as shown at 39, without departing from the spirit of the invention.

I claim: T

1. In a boiler having water legs, and a fire box having a top which is concave upward, the combination of an inclined water circulating tube and a substantially horizontal circulating duct, said tube extending through the fire box and opening at its lower end into the water space of the boiler, and at its upper end into said horizontal duct which is in the water space of the boiler, and which extends from the upper end of said tube to its own open end at a water leg of the boiler along the upper side of the lowest part of said fire box top, said horizontal duct having openings and fins at the bottom of its sides.

2. In a boiler having water legs, and a fire box having a top which is concave upward, the combination of a plurality of substantially vertical water circulating ducts and a substantially horizontal circulating duct, said vertical ducts being arranged in the water space of the boiler on opposite sides of the fire box, and opening at their lower ends into the water space of the boiler, and being connected at their upper ends by ducts to the sides oi said horizontal duct which is in the water space of the boiler, and which extends from said connecting ducts to its own open end at a water leg of the boiler along the upper side of the lowest part of said firebox top, said horizontal duct having openings and fins'at the bottom of its sides, the interior of each duct being in open communication with the duct to which it is connected.

3. In a boiler which has water legs, and a firebox having a top which is concave upward, the combination of an inclined water. circulating tube, a plurality of substantially vertical water circulating ducts, and a substantially horizontal circulating duct, said tube extending through the fire box and opening at its lower end into the Water space of the boiler, and at its upper end into said horizontal duct which is in the water space of the boiler and which extends from the upper end of saidtubes to its own open end at a water leg of the boiler along the upper side of the space of the boiler as to combination with a guard lowest part of said fire box top, said horizontal duct having openings and fins at the bottom of its sides, said vertical ducts being arranged in the water space of the boiler on opposite sides of the fire box, and opening at their lower ends into the water space of the boiler, and being connected at their upper ends by ducts to the sides of said horizontal duct, the interior of each duct being in open communication with the interior of the duct to which it is connected.

4. In a boiler which has water legs, and a fire box having a top which is concave upward, the combination of a substantially horizontal circulating duct in the water space of the boiler and means for propelling water through said duct which has openings and fins at the bottom of its sides, and which extends along the upper side of the lowest part of said fire box top to its own open end at a water leg of the boiler.

5. The invention as defined in claim 2, the duct work having a hole at substantially the summit of each vertical duct.

6. The invention as defined in claim 3, the duct work having a hole at substantially the summit of each vertical duct.

'7. The invention as defined in claim 2, stay bolts or braces extending through holes in the duct work.

8. The invention as defined in claim 3, stay bolts or braces extending through holes in the duct work.

9. The invention as defined in claim 2, the connecting ducts (which connect the vertical ducts to the horizontal duct) extending along the in-- terior of hollow braces which connect the fire box sides to the fire box top.

10. The invention as defined in claim 3, the connecting ducts (which connect the vertical ducts to the horizontal duct) extending along the interior of hollow braces which connect the fire box sides to the fire box top.

11. The invention as defined in claim 1 in combination with a bailie so located in the water space of the boiler as to preventdirect flow of the feed water to the inclined tube.

12. The invention as defined in claim 3 in combination with a baflie so .located in the water prevent direct flow of the feed wa r to the inclined tube.

13. The invention as defined in claim 2 in combination with a baiiie so located in the water space of the boiler as to prevent direct flowoi. the feed water to the entrance of one of the vertical ducts.

14. The invention as defined in claim 3 in combination with a baflle so located in the water space of the boiler as to prevent direct flow of the feed water to the entrance of one of the vertical ducts. J

15. The invention as defined in claim 1 in combination with a guard so located as to prevent accumulation of mud on boiler.

16. The invention as defined in claim 2 in combination with a guard so located as to pre vent accumulation of mud of the boiler.

17. The invention as defined in claim 3 in so located as to prevent accumulation of mud on the fire door ring of the boiler.

18. The invention as defined in claim 4 in combination with a guard so located as to prevent accumulation of mud on the fire door ring of the boiler.

.19, In a boiler having a water leg, and a fire the fire door ring of the door opening through said water leg, a. guard so located in the. water space of the boiler as to prevent accumulation of mud on the fire door ring. v v

20. The invention as defined in claim 19, the guard being so inclined as to deflect the mud to 7 one side of the fire door ring.

2-1. Theinventiou as defined in claim 19, the guard having substantially the shape of an inverted V so as to deflect mud to opposite sides *of the fire door ring, said guard being narrower than the width of the water leg to provide a 5 space for the escape of steam. h

1 WASI'HNGTON WISE. 

